package project1;

public class HelloWorld {
    public static void main(String[] args) {
        int [] a={10,20,30,40}, b[]={{1,2},{4,5,6,7}};
        b[0]= a;
        b[0][1] = b[1][3];
        System.out. println(b[0][3]); //【代码 1】
        System.out. println(a[1]); //【代码 2】
    }
}